Muhammad Youssef Abdulazeez was arrested on April 21, 2015 in Hamilton County, Tennessee, for driving under the influence. (Courtesy: Hamilton County Sheriff’s Office)

***UPDATED at 4:42pm on Thursday, July 16th***

Chattanooga, TN (AP) – A U.S. official says the gunman in the shootings in Tennessee has been identified as 24-year-old Muhammad Youssef Abdulazeez.

He was believed to have been born in Kuwait, and it was unclear whether he was a U.S. or Kuwaiti citizen. The official was speaking on condition of anonymity to discuss the ongoing, sensitive investigation. It was not immediately clear whether the gunman’s first name was spelled Muhammad or Mohammad.

He is from Hixson, Tennessee, which is just a few miles across the river from Chattanooga.

Authorities and officials say the gunman killed four Marines and wounded a police officer and others in two attacks on military facilities. The gunman was also dead.

***UPDATED at 3:09 P.M. on Thursday, July 16th***

Chattanooga, TN (ABC News) – Four people were killed and others injured Thursday in a shooting incident in Chattanooga, Tennessee, the mayor said at a press conference Thursday afternoon.

The injured individuals include a police officer, according to law enforcement officials.

PHOTO: People gather at the scene of a shooting at a military recruitment center in Chattanooga, Tenn., July 16, 2015. (Courtesy: April Grimmett/ABC News)

The shooter has not been identified, but was confirmed as being killed dead after being neutralized and it is no longer an active shooter situation, sources told ABC News.

There were two scenes of the shooting — one at a U.S. Naval Operation Support Center and a U.S. Armed Forces Recruiting Center that houses an Army and Marine recruiting office — though all of the injuries are believed to have occurred at the Naval Operation Support Center, according to federal officials.

At this point there is no indication this is related to terrorism, a federal official told ABC News.

The U.S. Bureau of Alcohol, Tobacco, Firearms, and Explosives has tweeted that they are responding to the shooting.

The U.S. Navy confirmed that the shooting took place.

***UPDATED at 2:41 P.M. on Thursday, July 16th***

Chattanooga, TN (AP/WKRN) – At least two Marines and one police officer were wounded in a shooting incident in Chattanooga, Tennessee, according to ABC news reports.

At least two military facilities in Tennessee were attacked in shootings Thursday, including one at a Navy recruiting building, officials said.

Scene from the search for a suspect in 2 military facility shootings in Tennessee. (Courtesy: WTVC)

Chattanooga police said in a tweet Thursday afternoon that the active shooter situation was over, though there was no word on what had happened to the suspect or suspects.

Chattanooga Mayor Andy Berke said at a news conference that it was a “very terrible situation.” He did not release any other details. Berke said there’s “an officer down” at a military reserve center.

Police have set up a command post near one of the sites. It was not immediately clear how many people may have been hurt.

The U.S. Navy said in a tweet that there was a shooting at a Navy recruiting building on Amnicola Highway in Chattanooga.

Law enforcement officials told recruiters at a facility 7 miles away on Old Lee Highway that they were also attacked by a shooter in a car. The shooter stopped in front of the recruiting facility, shot at the building and drove off, said Brian Lepley, a spokesman with the U.S. Army Recruiting Command in Fort Knox, Kentucky.

The Army recruiters at the facility told Lepley they were not hurt and had evacuated; Lepley said he had no information about recruiters for the other branches at the facility.

Marilyn Hutcheson, who works at Binswanger Glass just across the street from the U.S. Naval Reserve building on Amnicola Highway, said she heard a barrage of gunfire around 11 a.m.

“I couldn’t even begin to tell you how many,” she said. “It was rapid fire, like pow pow pow pow pow, so quickly. The next thing I knew, there were police cars coming from every direction.”

She ran inside, where she remained locked down with other employees and a customer. The gunfire continued with occasional bursts she estimated for 20 minutes.

“We’re apprehensive,” Hutcheson said. “Not knowing what transpired, if it was a grievance or terroristic related, we just don’t know.”

Near the other shooting location on Lee Highway, Nicholas Donohue heard a blast of gunshots while working at Desktop Solutions. But he had music playing and wasn’t quite sure what the noise had been. He turned off the music and seconds later, a second blast thundered. He took shelter in a back room.

“Even though it knew it was most likely gunfire I heard, you also don’t want to believe it’s happening in the moment,” he said. “Since I didn’t see anything, I couldn’t be sure.”

By the time he emerged, police were cordoning off the area.

U.S. Senator Bob Corker released the following statement on the tragic shootings.

“I am heartbroken by the tragic shootings that have taken place today in my hometown,” said Corker. “We have been in touch with federal, state and local officials and continue to monitor developments and have offered our assistance. This is a difficult day for Tennesseans and our thoughts and prayers are with all affected by this tragedy.”

Corker served as mayor of Chattanooga from 2001-2005.

***POSTED at 12:37 P.M. on Thursday, July 16th***

Chattanooga, TN – News outlets in the Chattanooga, Tennessee area, along with CNN, are reporting an “active shooter incident” at the Naval Reserve Center. In a tweet by Chattanooga Mayor, Andy Berek, says details will be released as soon as they are confirmed.

A witness near the scene has reported to CNN that she saw a man with a “high powered rifle” fire multiple shots from a silver Mustang. Via Twitter, Chattanooga State University has asked staff and students on its main campus to say inside because of a “confirmed shooting”.